Compilare: user.cpp: In function ‘void Percolate(int)’: user.cpp:20:7: warning: unused variable ‘ans’ [-Wunused-variable] { int ans=0; ^ user.cpp: In function ‘int Ins(int)’: user.cpp:57:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void Del(int)’: user.cpp:60:7: warning: unused variable ‘ans’ [-Wunused-variable] { int ans=0; ^ user.cpp: In function ‘int main()’: user.cpp:71:17: warning: unused variable ‘j’ [-Wunused-variable] { int x,t,caz,i,j; ^